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Generic Materials Search: limestone

6 results

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6 items found.

View the OMRI Generic Materials List Glossary in PDF format here.
Click on the arrow or the material name to view more details about each material.

Calcium Carbonate
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Includes oystershell flour, dolomite (not slaked), aragonite, and mined limestone (CaCO3).
205.203(d)(2) A mined substance of low solubility.
Calcium – nonsynthetic
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Nonsynthetic
May be supplied by: calcite, chalk, rock, ground clam shells, gypsiferous shale, ground limestone, dolomitic limestone, oyster shell flour, ground phosphate rock, soft phosphate rock, or shell flour. May not be fed in amounts above those needed for adequate nutrition and health maintenance for the species at its specific stage in life.
205.237(a) & 205.237(b)(2)
Gypsum By-products
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
Gypsum produced as a by-product of superphosphate manufacture (the reaction of rock phosphate and sulfuric acid), from precipitation of sulfur dioxide gas with limestone, or from dry-wall rejects is prohibited.
205.105(a)
Limestone
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
See CALCIUM CARBONATE.
205.203(d)(2) A mined substance of low solubility.
Limestone
Allowed with Restrictions
Crop Pest, Weed, and Disease Control
Nonsynthetic
For use as a pest lure, repellent, or as part of a trap, or as a disease control. May be used for other pesticidal purposes only if the requirements of 205.206(e) are met.
205.105, 205.206(b), 205.206(d) & 205.206(e)
Magnesium
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Synthetic/Nonsynthetic
Synthetic magnesium may be obtained from magnesium carbonate, magnesium chloride, magnesium hydroxide, magnesium oxide, and magnesium sulfate. Nonsynthetic magnesium may be obtained from magnesium limestone and magnesium mica. May not be fed in amounts above those needed for adequate nutrition and health maintenance for the species at its specific stage in life. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)